Toyota Tacoma 2015-2018 Service Manual: Precaution

(a) The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.

Expression

Ignition Switch (Position)

Engine Switch (Condition)

Ignition Switch off

LOCK

Off (Lock)

Ignition Switch ACC

ACC

On (ACC)

Ignition Switch ON

On

On (IG)

Engine Start

START

On (Start)

2. TROUBLESHOOTING PRECAUTIONS

When there is a malfunction in the contact point of the terminals or
installation problems with parts, removal and reinstallation of the suspected
problem parts may return the system to its normal condition either completely
or temporarily.

In order to determine the location of the malfunction, be sure to check
the engine conditions at the time the malfunction occurred, through data
such as DTC and freeze frame data outputs. Record this information before
disconnecting any connectors and removing or installing any parts.

Since the Vehicle Stability Control system may be influenced by malfunctions
in other systems, be sure to check for DTCs in other systems.

Be sure to remove and reinstall the hydraulic brake booster and each
sensor with the ignition switch OFF unless specified in the inspection procedure.

When removing and installing the hydraulic brake booster and each sensor,
be sure to check that the normal display is output during a test mode inspection
and a DTC output inspection after reinstalling all the parts.

The CAN communication system is used for communication between the skid
control ECU (master cylinder solenoid), steering angle sensor (spiral cable
sub-assembly), yaw rate and acceleration sensor (airbag sensor assembly)
and other ECUs.

If there is trouble in the CAN communication line, the DTC relating
to the communication line is output. If a DTC relating to the CAN communication
line is output, repair the malfunction in the communication line and troubleshoot
the Vehicle Stability Control system.

Since the CAN communication line has a specific length and route, it
cannot be repaired temporarily with a bypass wire.

Other materials:

Parking brake
Lever type
● Sets the parking brake
Fully set the parking brake while depressing the brake pedal.
At this time, the indicator will come on.
● Release the parking brake
Press the button
Turn the lever clockwise
Press it in completely
Pedal type
Sets the parking brake*.
...

Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Smart key system (for entry function) data and Diagnostic Trouble Codes (DTCs)
can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a malfunction
may be occurring in the smart key system. When the system seems to be malfunctioning,
...

Steering Angle Sensor Initialization Incomplete (C1439,C1445)
DESCRIPTION
The skid control ECU (brake actuator assembly) acquires steering angle sensor
zero point every time the ignition switch is turned ON and the vehicle is driven
at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also stores the
previous zero point.
The steering angle ...